Condenser structure



June 8 1926. 1,587,942

W. DUBILIER CONDENSER STRUCTURE Filed March '7, 1919 M //A 1 15 N ]4 Ugh WQAZQGMMMQQ 1 Mil.

gnmmtoz QTI Patented June 8, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM DUIBILIER, OF NEW YORK, N. Y., ASSIGNOR TO DUIBILIER CONDENSER & RADIO CORPORATION, A CORPORATION OF DELAWARE.

CONDENSER STRUCTURE.

Application filed March 7, 1919. Serial No. 281,182.

The invention has for an object provide a condenser in which the parts are so constructed and related to each other-as to form a compact device, which may be read ily assembled, which will be durable and efficient in use, and in which the condenser units are efl'ectively compressed to hold them in proper relation to each other and the conducting elements adequately insulated to prevent a breakdown.

Another object is to construct a. condenser which shall not be dependent in structure upon any particular form or type of casing.

Further objects and advantages of the invention will be in part obvious and in part specifically pointed out in the description. hereinafter contained, in which is disclosed one embodiment of the invention; it will be apparent however, that many of the features of the invention are useful in other relations than the specific, condenser disclosed. In the drawings,

Fig. l is a central vertical section of a condenser made in accordance with the invention, the section being taken on line l-l of Fig.2, looking in the direction of the arrows, and

Fig. 2 is a plan view of the condenser.

The condenser as a whole preferably is supported by a base member 1, which may be in the form of a substantially fiat plate, having arms 2, provided with holes 3 for the reception of suitable attaching bolts. The base member is ordinarily made of metal, and provides a ground connection for one terminal of the condenser. The lugs or cars 2 are for convenience in mounting the condenser and for connecting a terminal thereto.

A plurality of condenser sections 4, each preferably comprising a plurality of interleaved conducting plates of opposite polarity, are connected in series to form a stack of a type well known in the art, and which will not be described in greater detail as the specific character of the condenser sections is not ital to the present invention.

It is desirable that the condenser sections be placed under high and uniform pressure, to hold them in proper relation to each other, and for that purpose metallic clamping members are the most rigid and durable; however, it is also necessary to insulate the high potential sections effectually from all metal parts, and for this reason insulating clamping or compressor elements have been used, but such material has the disadvantage of deteriorating and weakening with long continued use, with the result that they pressure is not uniformly maintained.

In this invention, the condenser sections 4 may be clamped between a metallic compressor member 5 and the base member 1 which also acts as a compressor member, an insulating block 6 being interposed between the base member and the condenser sections,

if the h gh potential sections are to be placed ad acent the base member. Suitable tension members, such as bolts 7, having one end fastened into the base member, and the other end extending through the compressor member 5, are employed to force the compressor member tlghtly against the condenser sections, to put the desired amount of compression on them. The compressor member 5 18 so constructed, and related to the bolts 7 that the pressure applied through such bolts does not tend to bend the portion 16 of the compressor member which bears against the condenser stack, so that the condenser units are held under uniform compression which has no tendency to warp.

in the present instance, the portion 16 is raised above the remainder of the adjacent surface of compressor member 5, and the material of such member is weakened as by a groove adjacent the edges of the raised portion 16, or outwardly of the active area of the compressor member. Thus, if the compressor member becomes bowed by the strain applied through bolts 7, the bowing will take place outwardly of the raised portion 16, and will not result in uneven compression on the condenser stack or block. Since the insulating block 6 is reinforced and backed by .the base member, and the compressor member may also be made of metal, it is insured that the pressure may be uniformly and permanently applied to the condenser units. The particular means employed to force the compressor member toward the base member, however, is not essential.

It will be noted that the condenser stack is clamped under pressure independently of the casing 14 hereinafter described. Thus the weight of the casing need not be so large as to stand the stresses incident to compression, and the compression may be applied before the stack is associated with t e casing. However, since the potential of the members constituting the clamp is fixed, so to speak, at the potential of the end sec-' tion of the condenser stack, the casing 14 may be made to surround the clamp closely to avoid unduly large dimensions in the condenser. In other words, no substantial difference will exist between the casing and the damp which will require spacing or the provision of special insulation therebetween.

In cases where the high potential unit is adjacent the base member, an opening 8 or" relatively large size may be provided in the latter, so as to leave annular walls 9 on the base member to reinforce the insulating cover plate or block 6; A terminal post 10 having a heel plate 11 engaging the high potential unit, may then be passed through the insulating block 6 and the central portion of the opening 8, in which position it will be spaced a safe distance from the base member 1. An insulating bushing 12 may be provided for the post 10, and insulating tubes for the bolts 7, if desired. In the form illustrated, the end condenser sections will be electrically connected respectivelyto the heel plate 11 of the terminal post, and to the compressor member 5 or similar part which is grounded. The compressor member 5 together with the bolts 7, and base member 1, as described above, constitute condenser clamping means engaging one face of the stack and extending along the sides thereof into engagement with the plate 6, and overlying a considerable part of the outer face'of this plate, adjacent its periphery, pressing against it thereat. The holes or recesses through which portions of the clamping means such as the bolts 7 pass, facilitate the engagement of means with the plate 6.

An annular, cylindrical shell 14, may be used as a casing to protect the condenser and form a receptacle for wax compound, if the latter be employed. Such shell preferably has its edge 15 spun or crimped to hold it in shape, for instance over a reduced portion on the periphery of the block 6,

thus holding it securely in place in a simple manner. As indicated plainly in Figure l, the underside of the member 1 presses on the edge 15 of the shell 14; and thus holds the spun edge of the shell 14 tightly against the bevelled or reduced upper part of the plate 6. Thus the retaining means 7, which engage the member 5 held against the stack, and draw down the member 1 upon the block 6, serve to hold the member 1, the block 6 and shell securely together. Obviously the metal casing 14 in contact with member 1, which may be regarded as part of the c'asing, may also be used as a terminal by securing a conductor to this casing.

ile a specific form of the invention is the clamping rest/sea disclosed, it will be obvious that many changes may be made without departing from the spirit of the invention as defined in the following claims.

What is claimed is I. An. electrical condenser comprising a stack having condenser sections connected in series, and clamping means for exerting a relatively high pressure upon said stack, said clamping means comprising compression members at opposite end faces of said stack and tension members extending along the stack and between said compression members, said compression and tension members being all of metal whereby a me tallic clamp is provided extending around the stack, means whereby. said clamp is maintained substantially at the potential of one end of said stack, and means for) providing a relatively large amount of insulation and spacing between the opposite end of the stack and its corresponding compres sion member.

2. An electrical condenser comprising a stack having'condenser sections connected in series, compressor members disposed at opposite end faces of said stack and tension members extending along the stack and between said compression members, said compression and tension members being all of metal whereby a metallic clamp extending around the stack is provided, said clamp being substantially at the potential of one end of said stack, and an insulating block adapted to withstand high potentials and interposed between the other end of the stack and its corresponding compression member, whereby the compressive force of said last-mentioned member is exerted on said block.

3. An electrical condenser comprising a stack'having condenser sections connected in series, compressor members disposed at opposite end faces of said stack and tension members extending along the stack and between said compression members, said compression and tension members being all of metal whereby a metallic clamp extending around the stack is provided, said clamp being substantially at the potential of one end of said stack, and an insulating block adapted to Withstand high potentials and interposed between the other end of the stack and its corresponding compression member, whereby the compressive force of said last-mentioned member is exerted on said block, and a metallic plate beneath said insulating block, said plate bearing upon the corresponding face of the stack and being substantially at the potential of the latter. 4. An electrical condenser comprising a stack having condenser sections connected in series, compressor members disposed at opposite end faces of said stack and't'ension members extending along the stack and between said compression members, said compression and tension members being all of metal whereby a metallic clamp extending around the stack is provided, said clamp being substantially at the otential of one end of said stack, and an insulating block adapted to withstand high potentials and interposed between the other end of the stack and its corresponding compression member, whereby the compressive force of said last-mentioned member is exerted on said block, said condenser including a metallic casing substantially at the potential of said first-mentioned end of the stack.

5. A condenser comprising a metallic base member having an opening therein an insulating block disposed across said opening, a steel; of condenser units mounted on and compressed against said block, and a condenser terminal mounted within said opening and interposed between said base member and stack.

6. A condenser comprising a metallic base member having an opening therein, having means for supporting the structure as a whole, an insulating block disposed across said opening, a plurality of juxtaposed condenser units mounted on said block, a metallic compressor member bearing against the outermost unit, metallic binding devices extending between said base and compressor member to exert pressure upon said units, and a terminal for the condenser extending through said opening.

7. A condenser comprising a metallic base member an insulating block disposed across said member, a plurality of juxtaposed condenser units mounted at one 'side of said block, a metallic compressor member bearing against the unit fun thest from said block, binding devices extending between said base and compressor member, and a casing enclosing said condenser units, said compressor member and said binding devices being contained within said casing.

8. condenser comprising a metallic base member, an insulated block disposed on one side thereof, and a condenser stack mounted upon one side of said block, an annular shell enclosing said staclr and having an open end receiving said block, the periphery of the block being reduced adjacent said member, the rim of the shell being bent to engage the reduced periphery of the block, the base and the shell being secured to said block.

9'. A condenser comprising a base member arranged to support the structure as a whole, a plurality of condenser units at one side of said base member, a metallic compressor member engaging the outermost unit, a plurality of bolts extending between said base member and compression member to hold the condenser units under compression and establish electrical connection between said base and compression members, and an insulating sleeve extending along each bolt from a point adjacent the base member end thereof.

10. A condenser comprising a metallic base member having an opening therein, an insulating block disposed across said opening, a, plurality of juxtaposed condenser units mounted on said block, a metallic compressor member engaging the outermost unit, a plurality of bolts extendin between sald base member and compresslon member to hold said units under compression and establish electrical connection between said base and compression members, and an insulating sleeve for each bolt extending from said insulating block towards said compression member.

11. An electrical condenser comprising a stack having condenser sections connected in series, compressor members disposed at opposite end faces of said stack and tension members extending along the stack and between said compressor members, said compressor and tension members being all of metal whereby a metallic clamp extending around the stack is provided, said clamp being sub stantially of the potential of one end of said stack, and an'insulating block adapted to withstand high potentials and interposed between the other end of the stack audits corresponding compression member, whereby the compressive force of said last-mentioned member is exerted on said block, and a metallic casing surrounding said stack, one of said compression members being located adjacent and substantially parallel to the bot- .tom wall of said casing, and said tension avoided in the portion of the compression member which engages the active area of the stack.

' 13. An electrical condenser comprising a stack of condenser sections, a metallic compressor member adapted to exert pressure upon said stack, said, compressor member having a relatively strong and rigid portion engaging the active area of the stack, and said portion being raised above the adjacent surface of the compressor member, and means engaging outer parts of said compressor member for forcing the latter against the stack, said outer parts including relatively weak portions whereby bowing is avoided in the portion of the compressor member which engages the active area of the stack.

14. A high potential condenser comprising a metallic casing, a condenser stack therein including sections connected in series,

and clamping means for exerting pressure on said stack, said clamping means comprising a compressor member Within the casing adapted to exert pressure on an end face of the stack, metallic tension members extending from said compressor member between the sides of the stack and the side Walls of the casing to the opposite end face of the the side Walls of the casing and connecting said compressor members, whereby compression isapplied to the stack independently of said casing, means being provided to avoid substantial potential differences between said tension members and said casing.

16. A condenser comprising a stack having a plate of insulating material on at least one face, clamping means engaging the opposite face of the condenser and extending over and along the sides thereof toward the plate, and overlying and pressing upon a considerable part of the surface of the plate adjacent the periphery thereof, the plate having recesses, and said clamping means having portions entering said recesses to facilitate the engagement of the plate and enemas the clamping means, said portions" being on the exterior ofsaid stack.

17. A condenser comprising a stack having a plate of insulating material on at least one face, clamping means engaging the opthe clamping means, the said portions being on the exterior of said stack, the clamping means having one or more ears thereon.

18. An electrical condenser comprising a stack having a plate of insulating material on one face, a clamp engaging the opposite face of the stackand extending over the opposite sides and along said sides and engaging and overlying the plate around its periphery, compressing said plate and said stack tightly together, and at least one ter minal connected to the stack and projecting through an opening in the-plate to the outside of the condenser.

19. An electrical condenser comprising a casing of conductive material, a stack in the casing, a plate of insulating material overlying the stack and closing the casing, the condenser having at least one terminal connected to the stack and extending through the plate, said casing being bent against said plate and engaging it around its periphery, and a clamping member in the form of a metal plate in the casing exerting pressure on said stack and said plate of insulating material.

In-testimony that I claim the foregoing, I have hereunto set my hand this 21st day of February, 1919.

WILLIAM DUBILIER. 

